IV.—On the Pressure Cavities in Topaz, Beryl, and Diamond, and their bearing on Geological Theories.
Open Access
- 1 January 1862
- journal article
- Published by Cambridge University Press (CUP) in Transactions of the Royal Society of Edinburgh
- Vol. 23 (1) , 39-44
- https://doi.org/10.1017/s0080456800018408
Abstract
In the years 1823 and 1826 I communicated to this Society two papers “On the Existence of Two New Fluids in the Cavities of Precious Stones and other Minerals.” These two fluids were generally found together in the same cavity, though sometimes the cavities were occupied only by one of them. They were perfectly transparent and immiscible. The denser of the two occupied the angles of the cavities, or the necks, or narrow passages, or canals which united two or more larger cavities; while the rarer fluid floated, as it were, on the other in deep cavities, or filled the body of shallower ones, with the exception of a circular vacuity, which diminished and disappeared with the slightest increase of temperature, or enlarged itself and disappeared in consequence of the fluid being converted into vapour.Keywords
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